diff --git a/adventskalender/shared/style.css b/adventskalender/shared/style.css
index 03104c2..5170acb 100644
--- a/adventskalender/shared/style.css
+++ b/adventskalender/shared/style.css
@@ -41,8 +41,9 @@ html, body {
 .kalenderbild img {
   display: block;
   aspect-ratio: 16 / 9;
-  max-width: 100vw;
-  max-height: 100dvh;
+  /* Abstand für Rahmen oben + unten einberechnet */
+  max-height: calc(100dvh - 8px);
+  max-width: calc(100vw - 8px);
   border: 4px solid var(--ci-gold);
   border-radius: 12px;
   object-fit: contain;